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Heterogeneity in Cost-Sharing and Cost-Sensitivity, and the Role of the Prescribing Physician

Author

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  • Mariana Carrera
  • Dana Goldman
  • Geoffrey Joyce

Abstract

In this paper, we use individual level data on purchases of one of the most prescribed categories of drugs (cholesterol-lowering statins) to study the responses of physicians and patients to variation in the cost of drugs. In a sample of first-time statin prescriptions to employees from a group of Fortune 500 firms, we find that copay variation across plans has a relatively small effect on the choice of drug, and this effect does not vary with patient income. After the highly-publicized expiration of the patent for Zocor (simvastatin), however, prescriptions for this drug increased substantially, especially for lower-income patients. Our analysis suggests that physicians can perceive the adherence elasticity of their patients and adjust their initial prescriptions accordingly, but only in response to a large and universal price change. Using prescriber identifiers, we present suggestive evidence that physicians learn about a patient's price sensitivity through their own experience of prescribing to that patient.

Suggested Citation

  • Mariana Carrera & Dana Goldman & Geoffrey Joyce, 2013. "Heterogeneity in Cost-Sharing and Cost-Sensitivity, and the Role of the Prescribing Physician," NBER Working Papers 19186, National Bureau of Economic Research, Inc.
  • Handle: RePEc:nbr:nberwo:19186
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    References listed on IDEAS

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    1. Randall D. Cebul & James B. Rebitzer & Lowell J. Taylor & Mark E. Votruba, 2011. "Unhealthy Insurance Markets: Search Frictions and the Cost and Quality of Health Insurance," American Economic Review, American Economic Association, vol. 101(5), pages 1842-1871, August.
    2. Venkataraman, S. & Stremersch, S., 2007. "The Debate on Influencing Doctors’ Decisions: Are Drug Characteristics the Missing Link?," ERIM Report Series Research in Management ERS-2007-056-MKT, Erasmus Research Institute of Management (ERIM), ERIM is the joint research institute of the Rotterdam School of Management, Erasmus University and the Erasmus School of Economics (ESE) at Erasmus University Rotterdam.
    3. Amitabh Chandra & Jonathan Gruber & Robin McKnight, 2010. "Patient Cost-Sharing and Hospitalization Offsets in the Elderly," American Economic Review, American Economic Association, vol. 100(1), pages 193-213, March.
    4. Judith K. Hellerstein, 1998. "The Importance of the Physician in the Generic Versus Trade-Name Prescription Decision," RAND Journal of Economics, The RAND Corporation, vol. 29(1), pages 108-136, Spring.
    5. Frank, Richard G. & Zeckhauser, Richard J., 2007. "Custom-made versus ready-to-wear treatments: Behavioral propensities in physicians' choices," Journal of Health Economics, Elsevier, vol. 26(6), pages 1101-1127, December.
    6. Sriram Venkataraman & Stefan Stremersch, 2007. "The Debate on Influencing Doctors' Decisions: Are Drug Characteristics the Missing Link?," Management Science, INFORMS, vol. 53(11), pages 1688-1701, November.
    7. Amitabh Chandra & Jonathan Gruber & Robin McKnight, 2012. "The Impact of Patient Cost-Sharing on the Poor: Evidence from Massachusetts," NBER Working Papers 18023, National Bureau of Economic Research, Inc.
    8. Toshiaki Iizuka, 2012. "Physician Agency and Adoption of Generic Pharmaceuticals," American Economic Review, American Economic Association, vol. 102(6), pages 2826-2858, October.
    9. Gaynor Martin & Li Jian & Vogt William B, 2007. "Substitution, Spending Offsets, and Prescription Drug Benefit Design," Forum for Health Economics & Policy, De Gruyter, vol. 10(2), pages 1-33, July.
    10. Hanming Fang & Alessandro Gavazza, 2011. "Dynamic Inefficiencies in an Employment-Based Health Insurance System: Theory and Evidence," American Economic Review, American Economic Association, vol. 101(7), pages 3047-3077, December.
    11. Anna A. Levine Taub & Anton Kolotilin & Robert S. Gibbons & Ernst R. Berndt, 2011. "The Diversity of Concentrated Prescribing Behavior: An Application to Antipsychotics," NBER Working Papers 16823, National Bureau of Economic Research, Inc.
    12. Bradley Herring, 2010. "Suboptimal provision of preventive healthcare due to expected enrollee turnover among private insurers," Health Economics, John Wiley & Sons, Ltd., vol. 19(4), pages 438-448.
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    Cited by:

    1. Skipper, Niels & Vejlin, Rune, 2015. "Determinants of generic vs. brand drug choice: Evidence from population-wide Danish data," Social Science & Medicine, Elsevier, vol. 130(C), pages 204-215.

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    JEL classification:

    • I1 - Health, Education, and Welfare - - Health

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